On 30 Apr 2009, at 13:26, Andrew Farley wrote:
First, I have a few very large projects with upwards of 100K files [...] regularly background and foreground TextMate, and every time I do so with this "folder" open in a TextMate window, it takes anywhere from 2 to 20 seconds to re-foreground.
See http://wiki.macromates.com/Troubleshooting/Beachball
This will help with Find in Project as well.